Application of Space radiation Environment Reliability Model in Design and Evaluation of Avionics equipment

Modern avionics adopt a large number of advanced process integrated circuits, which are subjected to the single event effect(SEE) induced by atmospheric neutron radiation at flight altitude, resulting in black screen, crash, reset, restart, data loss, command error and other fault phenomena. "Unknown" and "Unrepeatable" faults are typical features of neutron SEE(NSEE), affecting flight safety. Based on the existing theoretical framework of space radiation environment reliability model, it is extended to the SEE induced by neutrons in the aviation atmosphere, and the SEE of systems, equipment, circuit boards and components is quantitatively analyzed. Based on this model, the reliability design optimization work such as SEE index formulation, sensitive component selection, soft error mitigation design evaluation, and test evaluation of avionics is discussed. Taking the atmospheric neutron SEE test of the Full Authority Digital Engine Control(FADEC) of the aero-engine as a case, the scientificity and operability of the proposed theoretical framework are verified.